Witherite Holl C M, Smyth J R, Laustsen H M S, Jacobsen S D, Downs R T Physics and Chemistry of Minerals 27 (2000) 467-473 Compression of witherite to 8 GPa and the crystal structure of BaCO3 II Sample: P = 1.98 GPa _database_code_amcsd 0008422 5.292 8.856 6.246 90 90 90 Pmcn atom x y z Uiso Ba .25 .4159 .7553 .015 C .25 .757 .916 .048 O1 .25 .899 .894 .021 O2 .460 .680 .918 .022